I came here twice as a friend lives in the area. The first time the waiter seemed confused but I was fine. I thought the bun did not hold up well and it was nothing spectacular but it is a burger joint. I came here again as we needed a quick bite to eat later at night. First of all that time I had the hardest time ordering as the waiter could not tell me what I could eat and kept getting confused. He tried to tell me the fries were not GF as they were frozen and they did not know what the supplier did with them before they got there. Then when my food came out (someone else said to order the fries) I thought the bun was wrong. My waiter argued but I asked him to check. He said it was a regular bun, but not his fault as it was so dark in there he couldn't see my food. I got my "new" GF burger about 10 minutes later. I was afraid of the bun at that point even though it was the GF one so I just decided to eat the patty. I noticed it was very overdone, but then realized half way through, I think they just reheated the one that was on the regular bun! Sure enough a few hours later I was violently ill after only eating a few bites of food. I would not recommend this place to anyone who needs to avoid gluten.

Decent food, gf buns and a dedicated fryer! Fixed errors with the order promptly; manager came out to apologize and ensure that it was correct the second time. No concerns about gf; daughter says burger was good. Fries were oversalted

Pretty good. The gf buns were great and there is a dedicated fryer!!! Burgers are big. I only gave it 4 because the waitress was new and not trained on gf. I asked for the manager and he was knowledgable. Fries were hand cut and yummy. $55 for 2 kids burgers and 2 adult burgers (all came with fries). The kids meals do not come with drinks, it's an extra charge.

Original Review:
Have only had their flagship burger, twice. The second time was to give the burger another chance. Both times were mediocre. Their fries and drinks are good, though. Three stars b/c their fries and drinks were delicious but their **flagship** burger wasn't memorable by any means.
Would I go again? Yes. But only to try a different entree. I would not order their flagship burger again.
Update 4/17/16: Visited on Saturday 4/16/16, Scottie (the server) was very knowledgeable about the gluten free options and substitutions that could be made. They made a custom drink for me that was similar to the one I couldn't order b/c it wasn't gluten free. I wanted the Turkey Burger, but the turkey party isn't gluten free so Scottie suggested we substitute their regular beef patty. My "Turkey" burger was yummy. I would order it again. I am a whimp when it comes to spicy food, but the tomatoes gave just the perfect amount of kick to wake up the taste buds. Furthermore, the richness of the pesto and the cheese played perfectly together with the acidity and freshness of tomato jam and arugula. Would I order this burger, again? Yes. My boyfriend ordered the BBLT and a margarita. He loved both. Would I visit, again? Yes. In fact, this visit bumped my rating up from 3 to 4 stars.

Lots of options that are not just a salad. Burgers are huge and the gf buns were good. Loved the fries! So happy to hear they have a dedicated gf fryer. Only thing I was bummed about was that I don't really eat beef burgers, I always go for turkey or veggie and both are not gluten free. Waitress was very knowledgeable and said the cook has celiac or knows someone who has celiac (can't remember) but made me way more comfortable knowing the cook knows to be extra careful.

Burgers were delicious! (My friend even loved her turkey burger) The GF bun was really good and it was an amazing bonus that the fryer was dedicated. I'm glad this place isn't close to me cause I'd be eating here all the time!

We had the most amazing burgers and fries at 5 Napkin! They have a dedicated fryer and my celiac son LOVED being able to order fries at a restaurant again. Food was amazing and staff we educated about celiac disease. They also have GF beer for the adults. Can't wait to go back next time I am in New York.

Best gf burger I have tasted. Wait staff all knew their stuff and there's a separate fryer for fries.
It's only their burgers which are gf on the menu but I asked if they could do any of the beef burgers as a chicken burger and this was no issue! Are here 4 times in my 1 week trip

Staff was very cautious and helpful. Service was fast. Gf drinks on the menu. The bun is not the same as the 5 Napkin Burger in NYC, which was disappointing, and they burgers didn't taste the same, but we're still good.

Went here based on the location to theatre and prior reviews listed below. Music was terribly loud and we were unable to have conversation over this music. GF burger and fries were average at best. Would not recommend.

So good! They are able to make any of their burgers GF and are also able to make a couple other dishes gluten free. The staff was very knowledgable and was even attentive enough to let me know which dishes my family had ordered I could and could not sample. The GF bun was one of the best I've had and the burger was DELICIOUS as were the fries! Would definitely come back!

My family and I chose this place after reading an article on the Boston Visitors Guide website. It stated they had GF fries and chicken wings - not the case! The waitstaff were not very helpful or overly friendly! Only the beef burgers are guaranteed GF - they have GF buns (which were hard/dry) or lettuce wrap. No dedicated fryer. Unfortunately the burger was not even that great. Best part was coleslaw and guacamole!! Should've checked reviews here first.

Fantastic! Waitress was very knowledgable, she asked if it was preference or allergy, and suggested their expanded GF beer selection. They have 3 GF beers (and a handful of ciders!). Burgers are great and they had GF buns (even though they're not on the menu?).

Burgers not great. Staff not very knowledgable or competent. They Do have a dedicated fryer for fries but the staff said they didn't till I showed them the previous reviews. Then they said yes they do.

Restaurant is a bit expensive (for everyone, not just those avoiding pesky glutens) but food is worth it. Burger's are flavorful, buns okay (typical crumbly bun). Dedicated gf fryer is a added bonus for those longing fries.
That said, if Boston Burger Co would get its act together and offer gf buns and dedicated fryer, I probably wouldn't return here. Burger co is cheaper and has better burgers and options.

Absolutely a great place. Order any burger you like and they'll make it gluten free. Fries also are cooked separate so no cross contamination. My mother is very sensitive and we had No issues! Highly recommend!

Good burger place. I wouldn't try to eat a whole burger with fries because of the grease - get a side salad. You have the ask the waiter to check what foods are gluten free. Some burgers like turkey are not gluten free. Would get more stars if separate gf menu and gf soy sauce for they sushi.

Best burger I've ever had. Amazing Gf rolls. Great separate gf fries. Didn't make me sick (and I'm very sensitive). They don't have a separate gf menu but wait staff was knowledgeable. Don't go here if your not looking for a burger because they don't offer much else other than very tastey burgers.

This place is amazing! They don't have a dedicated menu, but are very helpful and knowledgeable. They have a dedicated fryer and the fries are delicious! I was able to customize any.burger to make it exactly the way I wanted and had no problems afterward. Definitely eating here again! Highly recommended.

They have gf buns, but no gf menu. They also say they will use a separate fryer for gf fries. There is nothing that indicates that the fries were cooked separately when your plate comes out, so you have to have faith in the kitchen. It made me a little nervous.

So great! They have gf buns and a couple of gf burger options (not all though! So ask)....the waiter I had was so knowledgeable about which menu items were gf. They have gf dressings for the salad and you can have French fries cooked in a dedicated frier! Highly recommend!